Carrier transport mechanisms in cathodically biased meso‐porous p+‐Si against solutions containing Fe2+ and Co2+ species
Identifieur interne : 000701 ( Main/Exploration ); précédent : 000700; suivant : 000702Carrier transport mechanisms in cathodically biased meso‐porous p+‐Si against solutions containing Fe2+ and Co2+ species
Auteurs : Farida Hamadache [Belgique, Algérie] ; Bernard Gelloz [Japon]Source :
- physica status solidi c [ 1862-6351 ] ; 2009-07.
English descriptors
Abstract
This work reports on the use of the cyclic voltametry technique to study the electrochemical behavior of porous p+‐type silicon (PS) contacted by aqueous solutions containing Fe2+ and Co2+ electro‐actives species. Current‐potential (I‐V) measurements were performed on both flat and porous silicon substrates and different Fe2+ concentrations were considered. With flat Si, similar I‐V characteristic behaviors were obtained in 0.1 M Fe2+ and 0. 1 M Co2+ solutions, except that iron can be deposited from a potential more cathodic than cobalt. With porous Si, different I‐V characteristic behaviors were observed and a diffusion‐like current peak was detected in the presence of Fe2+ species. The observed current peak is located near the standard redox potential of iron. However, its intensity is lower than that of Fe2+ ions diffusion current peak and it does not increase as Fe2+ concentration increases. A three‐step carrier transport mechanism was proposed to show that the current peak could be attributed to iron nucleation on the pore walls via electroless deposition. Accordingly the difference observed in PS I‐V characteristics was attributed to the fact that electroless deposition on pore walls occurs at a potential for which the reduction of Co2+ ions is faster than that of Fe2+ ones and it can also occur at the pore bottom via electrodeposition. These results are used to explain the poor pore filling rate with iron, reported elsewhere. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Url:
DOI: 10.1002/pssc.200881079
Affiliations:
- Algérie, Belgique, Japon
- Vienne (Autriche), Wilaya d'Alger
- Alger, Vienne (Autriche)
- Université catholique de Louvain
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000401
- to stream Istex, to step Curation: 000143
- to stream Istex, to step Checkpoint: 000234
- to stream Main, to step Merge: 000707
- to stream Main, to step Curation: 000701
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Carrier transport mechanisms in cathodically biased meso‐porous p+‐Si against solutions containing Fe2+ and Co2+ species</title><author><name sortKey="Hamadache, Farida" sort="Hamadache, Farida" uniqKey="Hamadache F" first="Farida" last="Hamadache">Farida Hamadache</name></author><author><name sortKey="Gelloz, Bernard" sort="Gelloz, Bernard" uniqKey="Gelloz B" first="Bernard" last="Gelloz">Bernard Gelloz</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:265CD90F13E2431BF45D3A5BE62A34ED862850C2</idno><date when="2009" year="2009">2009</date><idno type="doi">10.1002/pssc.200881079</idno><idno type="url">https://api.istex.fr/document/265CD90F13E2431BF45D3A5BE62A34ED862850C2/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000401</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000401</idno><idno type="wicri:Area/Istex/Curation">000143</idno><idno type="wicri:Area/Istex/Checkpoint">000234</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000234</idno><idno type="wicri:doubleKey">1862-6351:2009:Hamadache F:carrier:transport:mechanisms</idno><idno type="wicri:Area/Main/Merge">000707</idno><idno type="wicri:Area/Main/Curation">000701</idno><idno type="wicri:Area/Main/Exploration">000701</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Carrier transport mechanisms in cathodically biased meso‐porous p+‐Si against solutions containing Fe2+ and Co2+ species</title><author><name sortKey="Hamadache, Farida" sort="Hamadache, Farida" uniqKey="Hamadache F" first="Farida" last="Hamadache">Farida Hamadache</name><affiliation wicri:level="4"><country xml:lang="fr">Belgique</country><wicri:regionArea>Unité PCPM, Université Catholique de Louvain, Croix du Sud 1, 1348 Louvain la Neuve</wicri:regionArea><placeName><region type="land" nuts="2">Vienne (Autriche)</region><settlement type="city">Vienne (Autriche)</settlement></placeName><orgName type="university">Université catholique de Louvain</orgName></affiliation><affiliation wicri:level="3"><country xml:lang="fr">Algérie</country><wicri:regionArea>Laboratoire de Physique des Matériaux, Faculté de Physique, Université des Sciences et de la Technologie Houari Boumédiène, BP 32 El‐Alia, 16111 Bab‐Ezzouar, Alger</wicri:regionArea><placeName><settlement type="city">Alger</settlement><region nuts="2">Wilaya d'Alger</region></placeName></affiliation></author><author><name sortKey="Gelloz, Bernard" sort="Gelloz, Bernard" uniqKey="Gelloz B" first="Bernard" last="Gelloz">Bernard Gelloz</name><affiliation wicri:level="1"><country xml:lang="fr">Japon</country><wicri:regionArea>Department of Electrical and Electronic Engineering, Faculty of Technology, Tokyo University of Agriculture & Technology</wicri:regionArea><wicri:noRegion>Tokyo University of Agriculture & Technology</wicri:noRegion></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Japon</country></affiliation></author></analytic><monogr></monogr><series><title level="j">physica status solidi c</title><title level="j" type="abbrev">Phys. Status Solidi (c)</title><idno type="ISSN">1862-6351</idno><idno type="eISSN">1610-1642</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Berlin</pubPlace><date type="published" when="2009-07">2009-07</date><biblScope unit="volume">6</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page" from="1689">1689</biblScope><biblScope unit="page" to="1693">1693</biblScope></imprint><idno type="ISSN">1862-6351</idno></series><idno type="istex">265CD90F13E2431BF45D3A5BE62A34ED862850C2</idno><idno type="DOI">10.1002/pssc.200881079</idno><idno type="ArticleID">PSSC200881079</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1862-6351</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>68.37.Hk</term><term>73.40.Mr</term><term>81.05.Rm</term><term>81.15.Pq</term><term>82.45.Yz</term><term>82.80.Fk</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This work reports on the use of the cyclic voltametry technique to study the electrochemical behavior of porous p+‐type silicon (PS) contacted by aqueous solutions containing Fe2+ and Co2+ electro‐actives species. Current‐potential (I‐V) measurements were performed on both flat and porous silicon substrates and different Fe2+ concentrations were considered. With flat Si, similar I‐V characteristic behaviors were obtained in 0.1 M Fe2+ and 0. 1 M Co2+ solutions, except that iron can be deposited from a potential more cathodic than cobalt. With porous Si, different I‐V characteristic behaviors were observed and a diffusion‐like current peak was detected in the presence of Fe2+ species. The observed current peak is located near the standard redox potential of iron. However, its intensity is lower than that of Fe2+ ions diffusion current peak and it does not increase as Fe2+ concentration increases. A three‐step carrier transport mechanism was proposed to show that the current peak could be attributed to iron nucleation on the pore walls via electroless deposition. Accordingly the difference observed in PS I‐V characteristics was attributed to the fact that electroless deposition on pore walls occurs at a potential for which the reduction of Co2+ ions is faster than that of Fe2+ ones and it can also occur at the pore bottom via electrodeposition. These results are used to explain the poor pore filling rate with iron, reported elsewhere. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</div></front></TEI><affiliations><list><country><li>Algérie</li><li>Belgique</li><li>Japon</li></country><region><li>Vienne (Autriche)</li><li>Wilaya d'Alger</li></region><settlement><li>Alger</li><li>Vienne (Autriche)</li></settlement><orgName><li>Université catholique de Louvain</li></orgName></list><tree><country name="Belgique"><region name="Vienne (Autriche)"><name sortKey="Hamadache, Farida" sort="Hamadache, Farida" uniqKey="Hamadache F" first="Farida" last="Hamadache">Farida Hamadache</name></region></country><country name="Algérie"><region name="Wilaya d'Alger"><name sortKey="Hamadache, Farida" sort="Hamadache, Farida" uniqKey="Hamadache F" first="Farida" last="Hamadache">Farida Hamadache</name></region></country><country name="Japon"><noRegion><name sortKey="Gelloz, Bernard" sort="Gelloz, Bernard" uniqKey="Gelloz B" first="Bernard" last="Gelloz">Bernard Gelloz</name></noRegion><name sortKey="Gelloz, Bernard" sort="Gelloz, Bernard" uniqKey="Gelloz B" first="Bernard" last="Gelloz">Bernard Gelloz</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/CobaltMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000701 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000701 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= CobaltMaghrebV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:265CD90F13E2431BF45D3A5BE62A34ED862850C2
|texte= Carrier transport mechanisms in cathodically biased meso‐porous p+‐Si against solutions containing Fe2+ and Co2+ species
}}
| This area was generated with Dilib version V0.6.32. |  |